問題的會議在PHP

代碼：問題的會議在PHP

<?php 
include ("conf/conf.php"); 
include ("classes/dbhelper.php"); 
$conf = new Dbconf(); 
$dbURL = $conf->get_databaseURL(); 
$dbUName = $conf->get_databaseUName(); 
$dbPword = $conf->get_databasePWord(); 
$dbName = $conf->get_databaseName(); 
$nameOfDbWithWorkers = $conf->get_nameOfDbWithWorkers(); 

if($_POST['auth']){ 
    $login = trim(($_POST['login'])); 
    $pass = trim($_POST['pass']); 

    $dbHelp = new DbHelper($dbURL, $dbUName, $dbPword, $dbName, $nameOfDbWithWorkers); 
    $userType = $dbHelp->getUser($login, $pass); 

    switch ($userType){ 
    case "admin": 
     startSession($login, $pass); 
     header("Location: adminpage.php"); 
     break; 
    case "user": 
     startSession($login, $pass); 
     header("Location: operatorpage.php"); 
     break; 
    case "nomatch": 
    echo 
    '<html> 
    <body> 
    <table width=100% height=100% border=0 cellpadding=0 cellspacing=0> 
     <tr valign="center" align="center"> 
      <td> 
       <form action="authorize.php" method="post"> 
       Логин:<input type="text" name="login"><br> 
       Пароль:<input type="password" name="pass"><br> 
       <input type="submit" name="auth"> 
       <font color = red> Неправильный пароль или логин</font> 
      </td> 
     </tr> 
    </table> 

    </form> 
    </body> 
    </html>'; 
     break; 
    }  
} 
else{ 
    header("Location: index.php"); 
} 
    function startSession($login, $pass){ 
     session_start(); 
     $_SESSION['login'] = $login; 
     $_SESSION['pass'] = $pass; 
     $_SESSION['usr_id'] = md5(crypt($login,$pass)); 
    }

當我輸入正確的用戶名和傳遞信息，我有下一個錯誤。

Warning: Cannot modify header information - headers already sent by (output started at Z:\home\ecl.ru\www\classes\dbhelper.php:24) in Z:\home\ecl.ru\www\authorize.php on line 20 

Warning: session_start() [function.session-start]: Cannot send session cookie - headers already sent by (output started at Z:\home\ecl.ru\www\classes\dbhelper.php:24) in Z:\home\ecl.ru\www\authorize.php on line 53 

Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at Z:\home\ecl.ru\www\classes\dbhelper.php:24) in Z:\home\ecl.ru\www\authorize.php on line 53

如何解決這個問題？

來源

2011-06-08 Divers

session_start（）應該是你的php文件的第一行。在發送任何聽衆之前 – 2011-06-08 10:55:50

有輸出在你的文件dphelper.php，作爲通知說了一句：

Warning: Cannot modify header information - headers already sent by (output started at Z:\home\ecl.ru\www\classes\dbhelper.php:24) in Z:\home\ecl.ru\www\authorize.php on line 20

頁眉是任何類型的輸出前發送，你的session_start（）可能會爲時已晚。正如人們已經說過的，一個建議是將session_start（）放在文件的頂部，另一個（可以與第一個一起實現） - 查看dbhelper.php並確保它不輸出任何內容（來自無論如何，它不應該）。而且，當我說「輸出」時，它不一定是echo/print/etc，它也可以是在文件末尾關閉php標籤後的空白區域。

來源

2011-06-08 11:13:08 Aurimas